Power-press.



R. A. HORNE.

POWER PRESS.

APPLICATION FILED Nov. 13. m1.

Patented May 21,1918;

2 SHEETSSHEET 1.

mesmw Pzessuna.

lmmmi R. A. HORNE.

POWER PRESS. APPLlCATiON FILED NOV. 13. 1911.

Patented May 21, 1918..

2 SHEETSSHEET 2.

lm/wuss Clttozuug lllT lll ROBERT A. HORNE, OF BIRMINGHAM, ALABAMA.

POWER-PRESS.

1T0 all whom it mag concern:

Be it known that I, ROBERT A. HORNE, 'acitizen of the United States ofAmerica, residing at Birmingham, in the county of Jefferson and State ofAlabama, have invented certain new and usefullmprovements inPower-Presses, of which the following is a specification. g

Y My invention relates to a power press adapted for pressing, shaping,forming and shearing metal sheets and bodies.

One object of my invention is to deslgn a power press in which the poweris applied in a novel and effective manner through'a multiplying trainof levers and preferably from a single power cylinder to operate themovable element ofthe press with the power and length of strokerequisite for the work in hand.

A further object is to so design the press that it can be cheaply andquickly constructed of standard structural metal parts which can bereadily assembled at thepoint where the press is to be built.

The Objects and advantages of my invention as to its various noveldetails of construction will be better understood by reference to theaccompanying drawings wherein I have sought to illustrate only the preferred embodiment'of my invention.

According to the drawings Figure 1 illustrates my powerpress in sideelevation with the movable member raised.

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. 1.

Fig. 3'is an end elevationof Fig. 1.

Fig.4 is a part plan and part sectional view taken on the line 4 1of'Fig. 1.

Fig. 5 is a detail sectional view of "the motor and its valve control;and y Fig. 6 is a detail view of thecross head on the piston. I

Similar reference numerals refer lar parts throughout the drawings.-

I have illustrated my invention as mounted on a concrete foundation 1having an intermediate recess or seat 2 therein below the level of thefloor 3. In'this recess I mount a vertical steam or compressed aircylinder 4:, the base of which is suitably anchored to the foundationwhile its top head stands flush with the top of the foundation 1. Onopposite sides of the cylinder head to simi Specification of LettersPatent.

Application filed November 13, 1917. SeriaI No. 201,814.

Patented May an rare.

are rigidly attached the base flanges 5 of two vertical guide plates 6having oppositely disposed alining vertical slots 7 therein lying in aplane which bisects the axis of the cylin- At its upper plates 6 isrigidly bolted to the brace bars 8 preferably formed by an integral bentbar riveted at its center '9, which is twisted to lie horizontally tothe stationary or bed corneredges each of these i member 10 of thepress. The lower ends of these braces 8 are made fast on opposite sidesto the lower ends of upright channel bars 11 which form the verticalelementsof the frame work. A pair of these channels 11 are arranged ateach end of the press with their flanges out-turned and their websdisposed in spaced parallelism and each channel has an angle bar 12riveted to itslower end and connected byanchor bolts 13 to "thefoundation 1. A

The stationary or bed member 10 of the press is built up of structuralparts, the pie ferredconstruction being illustrated in Fig. 2, where acenter I-beam l lis connected by rivets 15 to channels 16, one of whichis placed on each side of the I-beam and spaced therefrom by a fillerblock 17 which fits between the opposing flanges of the channel and theI-beam. The bed member is designed to fit betweenand to y 18 to thepairs of upright channels llat each end thereof, thus forming anintermediate spacer and transverse tie connection'for, the frame work. i

The movable orpresser member 19 of the power press is built up ofstructural membersld, 15, 16 and 17 in the same manner as the bed isbuilt of the corresponding parts be rigidly secured by rivets 14: 15, 16and 17 already described. The

presser member is free tweenthe pairs of upright channels 11 at itsends, and-to preventendwise displacement 1 bolt vertical guide bars 20.on each side at to slide vertically be its ends and dispose them tobear? against the inner flanges of the frame channels 11.

The mechanism for operating the presser member 19is connected thereto ateach end and comprises two pairs of pivotally connected toggle links 21,22, the lower link of the inner flange of the adjacent channel 11 nearits upper end. The links formingthe pair of toggles at each end ofthe'presser element 19 are connected together bya pair of arms 26 to abar 27, the arms being placed on each side of the bar and each providedwith a series of holes 28 adapted to receive a cross pin 29,- which atits center ispassed through one of a series of holes 27 in the verticalbar 27 and at its ends is made fast tothefree ends of a pair of rockerarms 30 pivotally connected to adjustable brackets 31 that are bolted tothe outer fiangeof the adjacent channel 11. The lower end of each bar 27is pivotally connected to the outer end of a power lever arm 32 which,as shown, is pivotally mounted near its outer end on a fulcrum pin 33which is mounted in a pair of bearing plates 34 riveted to andprojecting inwardly from the webs of the adjacent channels 11. Anadditional bearing hole 35 for each fulcrum pin 33 is provided nearerthe outer end of each lever to increase the leverage and reduce thelength of stroke, this hole intersecting the bearing'plate 34 and thewebs of the channels 11 to which the plates are riveted. The-levers 32extend inwardly from opposite sides toward and beyondthe center line ofthe press where their ends are provided with elongated slots 36 that arereceived in a cross head or yoke 37 on the top 'of the. piston .rod'38and are pivotally connected 'thereto by a pin 39 which. extends throughandbeyond the yoke arms. A pair of roller sleeves40 and 41 are mountedon the pin 39 ,and each form ,a roller bearing. working in the slot 36of its .respectivelever. Cotter keys 42 hold'the pin 39 in position inthe yoke while the ends-of vthe-pln'pro ect sufiiciently on each side toenter and be guided by the slots 7 in the plates 6.

The piston rod 38' is connected to a-piston 43 in the power cylinder 4and steam or air pressure isadmitted'to opposite ends of the cylinderthrough ports 44 and 45 as supplied by a pressure pipe 46 under controlof a rotary valve 47 whichalso' controls the exhaust from the cylinder.This valve has a valve arm 48 connected to a footpedal rod .49whichprojeets downwardly through the floorf3 and ,:through a spring cage50 in which is mounted a spring 51 thatnormally holds the pedal inraised position which moves the valve to lower the plunger 43.

To operate thepress, the treadle 52 is depressed, the'powermedium forcesthe piston 43 upwardly, and the yoke 37 rocks the power levers on their-respective fulcrum pins 33 to move their outer ends downwardly with agreatly multiplied power. The motion of the outer ends of the levers istransmitted by means of the bars 27 and pins 29 torocker'arms30 and arms26 to the hinge'pins 25"f0r'the several pairs of toggle links 21, 22,and as these are drawn outw'ardly, the presser member 19 is forceddownwardly with increasing power as the toggle links approach straightline'position. This accomplishes the power stroke and when completed,the foot pedal 52 is released, power is reversed in the cylinder and thetram of connections described moves tion of the presser member to thisvariable length of stroke for the bars 27, I make use of the series ofholes 28 in the arms to change the pin 29 to the hole which will bringthe toggle links to the desired position relative at the commencement ofthe stroke so that they will, at the conclusion of the stroke, bring thepresser member to the desired position.

In order to adapt the press for a wider range of usefulness the pressermember should be adjustable tower]: on thick or thin stock and to thisend I provide the flanges of the channels 11 with a series of bolt holesabove the positions of each bearing bracket 31 and 24 so that the boltssecuring these brackets may be set to a greater height above the bed 10.As the bearing brackets 31 are raised the pins 29 metals, or fortheoperation of metal rivetcrs 53 which are shown in Fig. 2 as having asupporting member -54 suitably secured to the bed 10 and adapted to holdthe riv'eters projecting in proper operating position with the upper ormovable riveter member disposed in the path of the presser head so thatthe lowering of the latter will operate the riveter. Shears may besimilarly connected and operated. This arrangement is of special benefitwhere the apparatus is used for the manufacture of elevator buckets andlike members requiring shearing, shaping, bending and rivetingoperations.

It will be obvious that my press can be readily assembled from standardstructural material and that it can be taken down and transported incollapsed form and at small expense. The leverage arrangements shown arecapable of operating with high terminal pressures derived from arelatively small initial pressure, and the press as a whole will takethe place of very heavy, cumbersome andexpensive machinery which is allthe marketinow afford for the class of work forwhich this apparatus issuitable. a

This invention is not intended to be restricted in scope to the specificembodiment shown, but contemplates such modifications as come within thespirit and scope of the claims. i

7 Having thus described my invention, what I claim as newand desire'tosecure by Letters Patent, is 1 1, A press comprising a frame, a bed member mounted in the frame, a movable presser member guided in the frame,toggles for imparting motion tothe presser member, power multiplyinglevers adapted to operate the toggles to move the presser member, and acommon power cylinder for operating said leverage mechanism.

2. A power press of the character described comprising a frame work ofvertical structural members, a horizontal bed member cross connected tothe upright members, a base to which the upright members are anchored, apresser member guided by said upright members], toggles connecting thepresser member to the upright members, a power element, powermultiplying transmission levers between said element and toggles to openand close the latter and operate the presser member, and supports forsaid connections.

3. A power press of the character described comprising a frame work ofvertical structural members, a horizontal bed member cross connected tothe upright members, a base to which the upright members are anchored, apresser member guided by said upright members, toggles connecting thepresser member to the upright members, means to vary the point ofconnection of the toggles to said upright members, a power element,power multiplying lever forming transmission connections between saidelement and toggles to open and close the latter and operate the pressermember, and sup ports for said connections.

4. A press comprising a frame, a bed member mounted in the frame, amovable presser member guided in the frame, toggles for imparting motionto the presser member, a power multiplying leverage mechanism adapted tooperate the toggles to move the presser member, a common power cylinderfor operating said leverage mechanism, and means to vary the length ofleverage mechanism to increase its power and modify the toggle movement.

stroke of the,

5. A press comprising a frame, a bed member mounted in the frame, amovable presser member guided in the frame, toggles for imparting motionto the presser member, a power multiplying leverage mechanism adapted tooperate the toggles to move the presser member, a common power cylinderfor operating said leverage mechanism, means to vary the length ofstroke of the leverage mechanism to increase its power, and means toshift the positionof the toggles relatively to said bed member.

6. A press comprising aframe, a bed member mounted in the frame, amovable presser member guidedin the frame, toggles for imparting motionto the presser member, a power multiplying leveragemechanism adapted tooperate the togglestomove the presser member, acommon power, cylin derfor operating said leverage mechanism, means to vary the length ofstroke of the leverage mechanism to increase its power, means to shiftthe position ofthe toggles relatively to said bed member, and means toadjust the parts of said leverage mechanism to accommodate it to changesin stroke and in position of the toggles.

7. A power press of the character described comprising a frame work ofvertical structural members, a horizontal bed member cross connected tothe upright members, a base to which the upright members are anchored, apresser member guided by said upright members, toggles hung from theupright members and connected to the presser member, a power cylinder, apiston therefor, power multiplying leverage connections be tween saidpiston and toggles to open and close the latter, and fulcrums for theleverage connections adjustably mounted on said upright members to varythe power applied to the presser member.

8. A power press of the character described comprising a support,upright members mounted thereon, a bed member connecting the uprightmembers, a power cylinder below the bed member, a vertically movablepiston in said cylinder, oppositely disposed levers having a lost-motionconnection at their adjacent ends to said piston, a presser memberguided in said uprights, toggles connecting the presser member to theuprights, and operating connections between the outer ends of the leversand the toggles to open and close the latter and move the pressermember, substantially as described.

9. A power press having a" frame comprising uprights on each side, a bedrigidly connected to the uprights, a cylinder verti cally disposedbeneath the bed, means to brace the cylinder to the frame work, aplunger operated by the cylinder, a cross pin carried by the plunger,vertical guides for said pin, levers having lost-motion connections attheir inner ends to said pin, fulcrums for said levers on said framework, a vertically movable presser member guided by said frame, andoperating connections between said levers and presser member,substantially 'as'described.

10. A power press having a frame comprising uprights on each side, a bedrigidly connected'to the uprights, a cylinder vertically disposedbeneath the bed, means to brace the cylinder to the frame work, aplunger operated by the cylinder, a cross pin carried by the plunger,vertical guides for said pin, levers having lost-motion connectionsat'their'inner endsto said pin, adjustable fulcrums for said levers onsaid frame.

work, a vertically movable presser member guided by said frame, and'adjustable operating connections between said levers and presser member,substantially as described. 11. In a power press, a frame,'a'bed, amovable pressermember, toggles connecting said member to the frame, barsconnected to the toggle joints, rocker arms hinged to'the frame and'adjustably'connected to said bars, levers fulcrnmed to the frame ateach side, rods connecting the levers to said links and Gcpies ofthispatent may bars, and a motor to move said levers and operate thepresser member.

12. In a power press of the character described, a structural metalframe work comprising uprights formed of spaced pairsof channel bars, abed inserted between the channels of each pair and made fast thereto, apresser member vertically movable between the channels toward and fromthe bed, a toggle connecting each channel bar to the presser member, acommon pivot pin for connectingthe links of each adjacent pair oftoggles, a number of rocker arms connected to the outer edges of thechannels, levers fulcrumed to the base of the uprights, power means torock the levers vertically, links connected to the outer ends of thelevers, and means connecting said links to said rocker arms and to thebars that are in turn connected to the toggle pivot pins, substantiallyas described.

In testimony whereof I afiix my signature.

ROBERT A. HORNE.

Witness NOMIE l/VELsH.

be obtained for five cents each, by addressing the Commissioner ofPatents,

Washington, D. G.

